It seems like Ukraine has already started retaliating against russia, this video showing an explosion that just recently occurred in Kursk
Air raid sirens and explosions going on in Belgorod over the past few hours, most likely a response from Ukraine after russias terrorist attack
A ground level angle showing 3 russian hypersonic cruise missiles targeting the Okhmatdyt children's hospital, further denying any argument that these missiles were meant for "military" targets